Use two reamers to ream a long taper pin hole?

[dbb-the-bruce]

I've been messing with taper pins and actually like them for assembly and alignment. So I decided to try a 2" long #0 taper pin.

The thing is that I can't find a reamer that covers the whole length of the taper (at least on McMaster-Carr). I'm guessing that people tend not to use long tapers.

So how would one go about reaming a long taper hole if it requires two reamers?
Is this easily done by feel?
I assume that you would ream the deepest smallest part first and then the larger upper part, but how do you know how far to go and not create a ridge?

Or is it crazy to try this and the answer is don't use long small taper pins because long small reamers are hard to find and expensive?
-Dave

 

[Jim F]

All the #0 taper reamers I looked at have 1-11/16 flute length.
To get over 2", you need to go to a #3.

https://www.mscdirect.com/browse/tn?searchterm=%230+taper+reamer&refinements=Taper+Pin+Size%3A%230

 

[rabler]

I've been messing with taper pins and actually like them for assembly and alignment. So I decided to try a 2" long #0 taper pin.

The thing is that I can't find a reamer that covers the whole length of the taper (at least on McMaster-Carr). I'm guessing that people tend not to use long tapers.

So how would one go about reaming a long taper hole if it requires two reamers?
Is this easily done by feel?
I assume that you would ream the deepest smallest part first and then the larger upper part, but how do you know how far to go and not create a ridge?

Or is it crazy to try this and the answer is don't use long small taper pins because long small reamers are hard to find and expensive?
-Dave

Generally I think you'd want a larger pin if you actually need 2" of pin. You typically set the pin and then trim the ends, so the pins start a bit long.

That said a small step between two reamers probably won't matter.

 

[dbb-the-bruce]

All the #0 taper reamers I looked at have 1-11/16 flute length.
To get over 2", you need to go to a #3.

https://www.mscdirect.com/browse/tn?searchterm=%230+taper+reamer&refinements=Taper+Pin+Size%3A%230

Exactly, but I bought 2" #0 for an idea AND they sell 3" #0 !!
So how do you ream a 3" taper hole that's #0?

 

[dbb-the-bruce]

Generally I think you'd want a larger pin if you actually need 2" of pin. You typically set the pin and then trim the ends, so the pins start a bit long.

That said a small step between two reamers probably won't matter.

I'm coming to the conclusion that the longer ones are meant to be fitted and trim. I want to use long pins for aesthetic reasons.

 

[mmcmdl]

Are these for alignment purposes such as split molds or are they going to be used to connect shafts etc ?

 

[dbb-the-bruce]

Are these for alignment purposes such as split molds or are they going to be used to connect shafts etc ?

I'm actually exploring the idea of using them for assembly of sculptural or kinetic pieces. The idea is to have the entire assembly done with taper pins in a way that creates a monolithic piece that can be disassembled and reassembled (occasionally).

So use wise it's a bit of both, strength and alignment.

Do people actually use full 3" length #0 tapers? I assume that if McMaster sells them then someone uses them (ha!) even if they are not common. And how do you ream a full 3" #0 if the reamers are all less than 2"